Question

Lab Prodecure Question - To determine the standard Gibbs free energy for the dissolution of barium hydroxide, what materials would I need to use in the lab?

Answer 1

Barium hydroxide (Ba(OH)₂) dissociates in the aqueous solution, as shown below.

Ba(OH)₂ ----> Ba²⁺(aq) + 2OH^-(aq)

Here, Ba²⁺ will deposit on the cathode as barium metal (Ba).

Formula: G^o = -nFE^o_cell

For the calculation of the E^o_cell, the electrochemical cell is required.

For the construction of the electrochemical cell, two electrodes (cathode and anode) are required.

And the salt bridge is required to connect both the electrodes.

Once, you find the E^o_cell, you can calculate the Gibbs free energy for the dissolution of barium hydroxide.